Sonos Is Working on New Headphones Called "Ace Ultra"
A government filing has revealed that Sonos is working on a new pair of over-ear headphones called the "Ace Ultra," and the company is expected to show them off at a launch event in September.
The filing was first spotted by the newsletter Lowpass and then reported by Engadget on August 12, 2026. A separate filing dated August 10, 2026 identifies a "Wireless Headphone" under model number RM052, with internal references to the name S52A, according to ecoustics. The Ace Ultra has an over-ear design, meaning the ear cups fully cover your ears, similar to the original Sonos Ace, which came out in 2024 and sells for $299.
The filing says the Ace Ultra will come in five colors: Greige, Shadow Black, Agave, Blush, and Sand. It also hints that the headphones will work with Sonos Voice Control, the company's built-in voice assistant. That detail lines up with what CEO Thomas Conrad said during a recent earnings call, where he told investors that Sonos was preparing to make artificial intelligence a central part of its business. During that same call, Sonos said it was planning a product launch event in September, and the Ace Ultra could be one of the products shown there.
For context, the existing Sonos Ace includes Active Noise Cancellation, which uses tiny microphones to pick up outside noise and then creates an opposite sound wave to block it out. It also offers up to 30 hours of battery life with noise cancellation turned on. A three-minute charge gives you three hours of listening, according to Sonos' own user guide. Sonos also sells a bundle called the "Personal Entertainment Set" that pairs the Ace with its Arc Ultra soundbar, suggesting the company sees the headphones as part of a home-theater setup rather than just a standalone product.
The AI angle is the part worth paying attention to. Bloomberg has reported that voice control is critical for a device without a screen to interact with AI assistants, and the Ace Ultra's apparent support for Sonos Voice Control suggests the headphones might let you talk to whatever AI features Conrad mentioned on the earnings call. Exactly what those AI features will do is not yet clear. 9To5Mac reported on August 11 that Sonos is planning the Ace Ultra with a "significant AI push," but did not describe specific features.
What we can confirm from the filings and the earnings call is that three things are happening at once: a new premium headphone is going through the government approval process, Sonos has set a September launch window, and the CEO has committed to making AI part of the company's product strategy. Whether the Ace Ultra's AI features go beyond simple voice commands into something like a conversational assistant is not yet confirmed by any source.
There is a familiar shape to this. Hardware companies have spent the last few years trying to make headphones do more than just play sound, with mixed results. What sets Sonos apart is that it already has a whole ecosystem of connected speakers and audio products that work together in your home, rather than being just a headphone maker like Sony or Bose. The existing Ace already connects to Sonos' multi-room audio system, which lets speakers throughout your house play the same or different music in sync. If the AI push turns into a real voice assistant built into the headphones, that connected ecosystem could give Sonos a real advantage.
The catch with these kinds of filings is that the government documents are partially blacked out, so they tell an incomplete story. The model name, the color options, and the voice-control hint are solid facts. Everything else, including the price, the specific AI features, and whether the Ace Ultra will replace or sit alongside the existing Ace, will stay unconfirmed until the September event.
